wifi_lux_sensor/wifi_lux_sensor.cpp

#include <ESP8266WiFi.h>
#include <Wire.h> 

#include "config.h"
#include "lux_sensor.h"

// ----------- DEFINES ---------------
#define LUX_ID 0x39     // I2C-Id of the lux-sensor

// ----------- GLOBALS ---------------
tsl2591Gain_t _gain;
tsl2591IntegrationTime_t _integration;

WiFiClient espClient;

void connectWifi() {
  WiFi.disconnect(false);
  Serial.printf("Wi-Fi mode set to WIFI_STA: %s\n", WiFi.mode(WIFI_STA) ? "Ok" : "Failed!");
  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);

  Serial.print("Connecting to ");Serial.println(WIFI_SSID);
  
  while (WiFi.status() != WL_CONNECTED) {
      delay(1000);
      Serial.print(WiFi.status());
      Serial.print(".\r\n");
      //WiFi.printDiag(Serial);
  }
  
  Serial.println("");
  Serial.print("Connected with IP: "),
  Serial.println(WiFi.localIP());
  Serial.printf("\n");
}



void write8 (uint8_t reg, uint8_t value)
{
  Wire.beginTransmission(LUX_ID);
  Wire.write(reg);
  Wire.write(value);
  Wire.endTransmission();
}

void enable(void)
{
  // Enable the device by setting the control bit to 0x01
  write8(TSL2591_COMMAND_BIT | TSL2591_REGISTER_ENABLE, TSL2591_ENABLE_POWERON | TSL2591_ENABLE_AEN | TSL2591_ENABLE_AIEN);
}

void disable(void)
{
  // Disable the device by setting the control bit to 0x00
  write8(TSL2591_COMMAND_BIT | TSL2591_REGISTER_ENABLE, TSL2591_ENABLE_POWEROFF);
}

void setConfiguration(tsl2591Gain_t gain, tsl2591IntegrationTime_t integration) 
{
  enable();
  _gain = gain;
  _integration = integration;
  write8( TSL2591_COMMAND_BIT | TSL2591_REGISTER_CONTROL, _integration | _gain);  
  disable();
}

void setup() {
  Serial.begin(38400); //Opens USB-Serial connection for terminal
  delay(1000);
  Serial.println("Init of WiFi-Lux-sensor project");
  connectWifi();
  Wire.begin(4, 5); // sda on pin D2, scl on pin D1

  // Config lux-sensor
  _integration = TSL2591_INTEGRATIONTIME_100MS;
  _gain        = TSL2591_GAIN_MED;

  // Set default integration time and gain
  setConfiguration(_gain, _integration);
}

void loop() {
  // put your main code here, to run repeatedly:
  byte error, address;
  
  Serial.print("WiFi heartbeat - ms since boot: ");
  Serial.print(millis());
  Serial.println();

  Wire.beginTransmission(LUX_ID);
  error = Wire.endTransmission();

  if (error == 0) {
    Serial.println("I2C-Lux device found");
  }
  else if (error==4) {
    Serial.println("--Unknown error.");
  }    

  Serial.println("done\n");
 
  delay(1000);
  
}